Title :
High Q, precision SC cut resonators with low acceleration sensitivity
Author :
Haskell, R.B. ; Morley, P.E. ; Stevens, D.S.
Author_Institution :
Vectron Int.-Hudson, Hudson, NH, USA
Abstract :
A new mounting structure has enabled the construction of high Q resonators with very low acceleration sensitivity. Values in the range of mid parts in 1011 to low parts in 1010 per g have been achieved with a simple planar support structure. Utilizing a thin chemically etched lead-frame, a four-point mount with built in stress relief has been designed to mount in the plane of the resonator. The advantages of this structure include good symmetry, minimal residual manufacturing stresses, and minimal asymmetric vibratory stresses. Many different configurations have been designed and built using 8 and 10 mm 10 MHz 3rd overtone SC cut plano-convex crystals with excellent results.
Keywords :
Q-factor; acceleration; crystal resonators; internal stresses; packaging; sensitivity; stress effects; symmetry; vibrations; 10 MHz; 10 mm; 8 mm; QRM; asymmetric vibratory stresses; chemically etched leadframe; g-sensitivity; high Q precision SC cut resonators; low acceleration sensitivity; planar support structure; quad relief mount; quartz crystal resonators; residual manufacturing stresses; stress relief mount; symmetrical structure; third-overtone SC cut plano-convex crystals; vibration; Acceleration; Chemicals; Crystals; Degradation; Etching; Manufacturing processes; Performance analysis; Residual stresses; Resonant frequency; Stability;
Conference_Titel :
Frequency Control Symposium and PDA Exhibition, 2002. IEEE International
Print_ISBN :
0-7803-7082-1
DOI :
10.1109/FREQ.2002.1075866
